syzkaller login: [ 30.610724] BUG: Bad rss-counter state mm:000000001ed46097 type:MM_FILEPAGES val:33 [ 30.612073] BUG: Bad rss-counter state mm:000000001ed46097 type:MM_ANONPAGES val:22 [ 30.760192] ================================================================== [ 30.761280] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.762565] Read of size 8 at addr ffff88801695c228 by task sshd/221 [ 30.763499] [ 30.763761] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.764835] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.766042] Call Trace: [ 30.766463] [ 30.766827] dump_stack_lvl+0x91/0xf0 [ 30.767335] print_report+0xcc/0x620 [ 30.767824] ? __virt_addr_valid+0x102/0x340 [ 30.768375] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.768993] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.769610] kasan_report+0xbe/0xf0 [ 30.770088] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.770722] vma_interval_tree_remove+0xc75/0xec0 [ 30.771325] vma_prepare+0xc54/0x11a0 [ 30.771806] __split_vma+0x5af/0x950 [ 30.772283] ? __pfx___split_vma+0x10/0x10 [ 30.772825] ? find_held_lock+0x2c/0x110 [ 30.773343] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.773916] ? lock_is_held_type+0x9f/0x120 [ 30.774478] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.775089] ? mtree_range_walk+0x632/0x900 [ 30.775641] ? mas_walk+0x5c7/0x7c0 [ 30.776130] do_vmi_munmap+0x1f1/0x2b0 [ 30.776627] mmap_region+0x1f9/0x2660 [ 30.777110] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.777630] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.778356] ? __pfx_lock_acquire+0x10/0x10 [ 30.778900] ? __pfx_mmap_region+0x10/0x10 [ 30.779430] ? security_mmap_addr+0x7d/0xa0 [ 30.779962] ? get_unmapped_area+0x1f5/0x3f0 [ 30.780518] do_mmap+0x854/0xf00 [ 30.780963] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.781456] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.782025] ksys_mmap_pgoff+0x3af/0x500 [ 30.782568] do_syscall_64+0x3f/0x90 [ 30.783049] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.783708] RIP: 0033:0x7f49c0f4fd82 [ 30.784166] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 30.786332] RSP: 002b:00007ffe19477af8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.787246] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f49c0f4fd82 [ 30.788103] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f49c0389000 [ 30.788957] RBP: 00007f49c0389000 R08: 0000000000000009 R09: 0000000000001000 [ 30.789802] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bc5aabbec0 [ 30.790656] R13: 00007ffe19477b10 R14: 00007ffe19477b40 R15: 00007ffe19477ea0 [ 30.791517] [ 30.791807] [ 30.792026] Allocated by task 214: [ 30.792454] kasan_save_stack+0x22/0x50 [ 30.792967] kasan_set_track+0x25/0x30 [ 30.793469] __kasan_slab_alloc+0x59/0x70 [ 30.794004] kmem_cache_alloc+0x16b/0x370 [ 30.794548] vm_area_dup+0x20/0x160 [ 30.795019] __split_vma+0x170/0x950 [ 30.795489] split_vma+0xc6/0x110 [ 30.795927] mprotect_fixup+0x8d2/0xb30 [ 30.796431] do_mprotect_pkey+0x87e/0xd40 [ 30.796959] __x64_sys_mprotect+0x78/0xc0 [ 30.797498] do_syscall_64+0x3f/0x90 [ 30.797978] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.798640] [ 30.798864] Freed by task 214: [ 30.799269] kasan_save_stack+0x22/0x50 [ 30.799771] kasan_set_track+0x25/0x30 [ 30.800267] kasan_save_free_info+0x2b/0x50 [ 30.800802] __kasan_slab_free+0x10a/0x190 [ 30.801333] kmem_cache_free+0x10d/0x4d0 [ 30.801838] rcu_core+0x8c8/0x2860 [ 30.802297] __do_softirq+0x1b7/0x7d4 [ 30.802788] [ 30.803013] Last potentially related work creation: [ 30.803604] kasan_save_stack+0x22/0x50 [ 30.804186] __kasan_record_aux_stack+0x8e/0xa0 [ 30.804776] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.805427] remove_vma+0x139/0x170 [ 30.805878] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.806442] do_vmi_munmap+0x1f1/0x2b0 [ 30.806931] __vm_munmap+0x138/0x3a0 [ 30.807401] __x64_sys_munmap+0x59/0x80 [ 30.807899] do_syscall_64+0x3f/0x90 [ 30.808375] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.809019] [ 30.809237] The buggy address belongs to the object at ffff88801695c1d0 [ 30.809237] which belongs to the cache vm_area_struct of size 168 [ 30.810724] The buggy address is located 88 bytes inside of [ 30.810724] freed 168-byte region [ffff88801695c1d0, ffff88801695c278) [ 30.812116] [ 30.812334] The buggy address belongs to the physical page: [ 30.812994] page:000000000c7961ea refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1695c [ 30.814087] memcg:ffff88800ee0ee01 [ 30.814540] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.815193] page_type: 0xffffffff() [ 30.815656] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.816597] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ee0ee01 [ 30.817517] page dumped because: kasan: bad access detected [ 30.818205] [ 30.818423] Memory state around the buggy address: [ 30.819009] ffff88801695c100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.819868] ffff88801695c180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.820727] >ffff88801695c200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.821604] ^ [ 30.822180] ffff88801695c280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.823066] ffff88801695c300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.823925] ================================================================== [ 30.824961] Disabling lock debugging due to kernel taint [ 32.840495] BUG: Bad rss-counter state mm:00000000f14f6dc9 type:MM_FILEPAGES val:33 [ 32.841656] BUG: Bad rss-counter state mm:00000000f14f6dc9 type:MM_ANONPAGES val:22 [ 33.304557] BUG: Bad rss-counter state mm:00000000842e3425 type:MM_FILEPAGES val:33 [ 33.305743] BUG: Bad rss-counter state mm:00000000842e3425 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61356' (ECDSA) to the list of known hosts. 2023/06/20 12:33:45 fuzzer started 2023/06/20 12:33:46 dialing manager at localhost:36067 2023/06/20 12:33:46 checking machine... 2023/06/20 12:33:46 checking revisions... [ 33.934131] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:33:46 testing simple program... [ 33.976272] cgroup: Unknown subsys name 'net' [ 34.036714] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:33:45 Registers: info registers vcpu 0 RAX=ffff88806ce36180 RBX=ffff88800e1105f0 RCX=ffffffff815343f6 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffff88800844f780 RSP=ffff88806ce09e00 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=0000000000000200 R13=ffffea0000384400 R14=ffffffff813782f8 R15=ffff88800e110670 RIP=ffffffff8181073a RFL=00000046 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f6ccc5e87b0 CR3=000000000dfbc000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=2035343a33333a3231203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035343a33333a3231203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff8613f40e RDX=0000000000000001 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff888016b17368 RSP=ffff888016b172a0 R8 =ffffffff8613f412 R9 =ffff888016b17350 R10=0000000000038001 R11=0000000000021e7d R12=ffff888016b17370 R13=ffff888016b17358 R14=ffff888016b17538 R15=ffff888016b17310 RIP=ffffffff81131153 RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fa082bb4900 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007ffdc04cb000 CR3=000000000dc76000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000